package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        if (!employee.getPassword().equals(DigestUtils.md5DigestAsHex(password.getBytes()))) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void create(EmployeeDTO employeeDTO) {
        // 复制employeeDTO的属性到employee中
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        // 设置employee剩下的字段
        employee.setPassword(PasswordConstant.DEFAULT_PASSWORD);
        employee.setStatus(StatusConstant.ENABLE);

        // 调用 mapper 插入数据
        employeeMapper.create(employee);
    }

    /**
     * 根据员工昵称分页查询员工
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQueryByName(EmployeePageQueryDTO employeePageQueryDTO) {
        // 开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQueryByName(employeePageQueryDTO.getName());
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 启用, 禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void changeStatus(Integer status, Long id) {
        Employee employee = Employee.builder().status(status).id(id).build();
        employeeMapper.update(employee);
    }

    /**
     * 根据 id 查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee queryById(Long id) {
        Employee employee = employeeMapper.queryById(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 更新员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
        employeeMapper.update(employee);
    }

}
